Jack can come back. I mean, honestly. If he can come back after his organs have been donated, he can certainly come back after he falls down an elevator shaft. He was unconscious and taken to Mercy Hospital. In all the confusion, he was misidentified because his wallet was thrown clear and landed near a man with similar features who died that night. Our Jack's in a coma now,having been transported to a nursing home or rehabilitation center outside Salem.

I like Jack...He's SO much better as a character than Daniel could ever hope to be.